Combined Risk Index Report for Viti

Summary Table

Province Mean Rainfall in Driest Quarter (mm) Median Rainfall in Driest Quarter (mm) Std Dev Rainfall in Driest Quarter (mm) Mean Height above Sea Level (m) Median Height above Sea Level (m) Std Dev Height above Sea Level (m) Mean Height above Drainage Network (m) Median Height above Drainage Network (m) Std Dev Height above Drainage Network (m) High Risk Sites (Rainfall) High Risk Sites (Height above Sea Level) High Risk Sites (Height above Drainage Network)
Western 228 221 74 49 21 106 17 10 25 317 (100.0%) 73 (23.0%) 149 (47.0%)
Northern 247 274 86 25 18 27 15 10 17 242 (100.0%) 78 (32.0%) 113 (47.0%)
Eastern 260 304 135 20 13 22 17 9 21 127 (100.0%) 49 (39.0%) 64 (50.0%)
Central 411 420 84 33 18 43 16 10 18 268 (100.0%) 75 (28.0%) 121 (45.0%)
Rotuma 501 627 280 8 7 5 6 7 4 5 (100.0%) 3 (60.0%) 4 (80.0%)
National 290 279 121 34 18 68 16 10 21 959 (100.0%) 278 (29.0%) 451 (47.0%)

Charts

Mean Rainfall in Driest Quarter by Province
Mean Rainfall in Driest Quarter by Province
Mean Height above Sea Level by Province
Mean Height above Sea Level by Province
Mean Height above Drainage Network by Province
Mean Height above Drainage Network by Province

Combined Risk Index Map

Risk Index Legend

Very High Risk (0.8 - 1.0)

High Risk (0.6 - 0.8)

Moderate Risk (0.4 - 0.6)

Low Risk (0.2 - 0.4)

Very Low Risk (0 - 0.2)

Histograms

Overall Histograms

Overall Histogram of Rainfall in driest quarter
Overall Histogram of Height above sea level
Overall Histogram of Height above drainage network
Overall Histogram of combined_risk_index

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 290 279 121 959 (100.0%)
Height above sea level 34 18 68 278 (29.0%)
Height above drainage network 16 10 21 451 (47.0%)

Histograms for Western

Histogram of Rainfall in driest quarter for Western
Histogram of Height above sea level for Western
Histogram of Height above drainage network for Western
Histogram of combined_risk_index for Western

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 228 221 74 317 (100.0%)
Height above sea level 49 21 106 73 (23.0%)
Height above drainage network 17 10 25 149 (47.0%)

Histograms for Northern

Histogram of Rainfall in driest quarter for Northern
Histogram of Height above sea level for Northern
Histogram of Height above drainage network for Northern
Histogram of combined_risk_index for Northern

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 247 274 86 242 (100.0%)
Height above sea level 25 18 27 78 (32.0%)
Height above drainage network 15 10 17 113 (47.0%)

Histograms for Eastern

Histogram of Rainfall in driest quarter for Eastern
Histogram of Height above sea level for Eastern
Histogram of Height above drainage network for Eastern
Histogram of combined_risk_index for Eastern

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 260 304 135 127 (100.0%)
Height above sea level 20 13 22 49 (39.0%)
Height above drainage network 17 9 21 64 (50.0%)

Histograms for Central

Histogram of Rainfall in driest quarter for Central
Histogram of Height above sea level for Central
Histogram of Height above drainage network for Central
Histogram of combined_risk_index for Central

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 411 420 84 268 (100.0%)
Height above sea level 33 18 43 75 (28.0%)
Height above drainage network 16 10 18 121 (45.0%)

Histograms for Rotuma

Histogram of Rainfall in driest quarter for Rotuma
Histogram of Height above sea level for Rotuma
Histogram of Height above drainage network for Rotuma
Histogram of combined_risk_index for Rotuma

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 501 627 280 5 (100.0%)
Height above sea level 8 7 5 3 (60.0%)
Height above drainage network 6 7 4 4 (80.0%)

Methodology